Identification of genetic populations of the pacific blue shrimp penaeus stylirostris of the gulf of California, Mexico

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44 Citations (Scopus)

Abstract

Species are often composed of discrete breeding units (i.e. populations or stocks) which, while not reproductively isolated from other such groups, may have limited opportunities to exchange genetic material because of geographic distance, barriers to migration, or spawning asynchrony. Low levels of gene flow between stocks may result, over time, in their genetic divergence, and species that are subdivided into morphologic or genetically distinct stocks are said to be structured. The aim of our investigation was to test whether or not Penaeus stylirostris from the Gulf of California (Mexico) was structured into genetically distinct populations. Shrimp samples were collected in 1996 from six regions of the Gulf where specimens with distinct morphologic characteristics had previously been identified. Statistical analysis of 324 RAPD loci (randomly amplified polymorphic DNA), resolved through polyacrylamide gels and scored for each of 78 specimens, permitted the quantification and comparison of between-stock genetic differences. The finding that genetically discrete stocks of P. stylirostris can be found in a small portion of the geographic distribution range of the species, disagrees with the long-held perception that this resource is panmictic in nature. This new evidence is not only of interest for selective breeding programs in the shrimp aquaculture industry, but is also relevant to the management of the Mexican shrimp fishery which, at present, is perceived and managed as a single stock.

Original languageEnglish (US)
Pages (from-to)875-885
Number of pages11
JournalMarine Biology
Volume137
Issue number5-6
DOIs
StatePublished - 2000

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Litopenaeus stylirostris
shrimp fisheries
Gulf of California
population genetics
Mexico
shrimp culture
polyacrylamide
selection methods
shrimp fishery
selective breeding
gene flow
aquaculture industry
geographical distribution
shrimp
statistical analysis
spawning
gels
genetic variation
loci
breeding

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Identification of genetic populations of the pacific blue shrimp penaeus stylirostris of the gulf of California, Mexico. / Aubert, H.; Lightner, Donald V.

In: Marine Biology, Vol. 137, No. 5-6, 2000, p. 875-885.

Research output: Contribution to journalArticle

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